:root {
  /* Premium Enterprise Colors */
  --color-primary: #0A1128; /* Deep rich navy */
  --color-secondary: #0066FF; /* Vibrant electric blue */
  --color-accent: #00D2FF; /* Cyan accent */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  
  --color-bg: #FFFFFF;
  --color-bg-light: #F8FAFC;
  --color-bg-subtle: #F1F5F9;
  
  --color-border: #E2E8F0;
  --color-border-subtle: #F1F5F9;
  
  --color-text-primary: #0F172A;
  --color-text-secondary: #475569;
  --color-text-muted: #94A3B8;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Radius */
  --radius-card: 24px;
  --radius-button: 12px;
  --radius-input: 12px;

  /* Premium Multi-layered Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(10, 17, 40, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(10, 17, 40, 0.05), 0 2px 4px -1px rgba(10, 17, 40, 0.03);
  --shadow-lg: 0 20px 25px -5px rgba(10, 17, 40, 0.05), 0 8px 10px -6px rgba(10, 17, 40, 0.02);
  --shadow-xl: 0 25px 50px -12px rgba(10, 17, 40, 0.1);
  --shadow-glass: 0 8px 32px 0 rgba(0, 102, 255, 0.1);
  --shadow-inner: inset 0 2px 4px 0 rgba(10, 17, 40, 0.03);

  /* Transitions */
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  font-size: 18px;
  overflow-x: hidden;
}

/* Typography Enhancements */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

h1 { font-size: clamp(3rem, 5vw, 4.5rem); letter-spacing: -0.04em; }
h2 { font-size: clamp(2.25rem, 4vw, 3.5rem); }
h3 { font-size: clamp(1.75rem, 3vw, 2.25rem); }
h4 { font-size: 1.5rem; }

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: var(--transition-smooth);
}

a:hover {
  color: var(--color-primary);
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Grid System */
.grid {
  display: grid;
  gap: 32px;
}
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); gap: 64px; align-items: center;}

/* Buttons - Premium Feel */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius-button);
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-secondary) 0%, #0052cc 100%);
  color: #fff;
  box-shadow: 0 4px 14px 0 rgba(0, 102, 255, 0.39);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 102, 255, 0.5);
  color: #fff;
}

.btn-secondary {
  background-color: var(--color-bg);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  border-color: var(--color-text-muted);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Glassmorphism Header */
.header {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  height: 80px;
  z-index: 1000;
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  transition: var(--transition-smooth);
}

.header.scrolled {
  box-shadow: var(--shadow-sm);
  height: 70px;
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.05em;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-weight: 400;
  font-size: 15px;
  padding: 8px 0;
  position: relative;
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-secondary);
  transition: var(--transition-smooth);
}

.nav-links a:hover::after {
  width: 100%;
}

/* Footer */
.footer {
  background-color: var(--color-bg-light);
  padding: 96px 0 48px;
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 64px;
}

.footer-col h4 {
  font-size: 16px;
  margin-bottom: 24px;
  color: var(--color-primary);
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 16px; }

.footer-col a {
  color: var(--color-text-secondary);
  font-size: 15px;
}

.footer-col a:hover {
  color: var(--color-secondary);
}

/* Utilities */
.text-center { text-align: center; }
.section { padding: 120px 0; }
.bg-light { background-color: var(--color-bg-light); }
.bg-subtle { background-color: var(--color-bg-subtle); }
.bg-gradient {
  background-color: var(--color-bg-light);
  background-image: 
    linear-gradient(rgba(10, 17, 40, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 17, 40, 0.04) 1px, transparent 1px),
    linear-gradient(180deg, rgba(248,250,252,0) 0%, #F1F5F9 100%);
  background-size: 40px 40px, 40px 40px, 100% 100%;
  background-position: center top;
  position: relative;
}
.bg-gradient::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at center 40%, transparent 10%, var(--color-bg-light) 90%);
  pointer-events: none;
  z-index: 0;
}
.bg-gradient > .container {
  position: relative;
  z-index: 1;
}

/* Premium Cards */
.card {
  background: white;
  border-radius: var(--radius-card);
  padding: 40px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-subtle);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0));
  z-index: -1;
  opacity: 0;
  transition: var(--transition-smooth);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-border);
}

.card img {
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.card:hover img {
  transform: scale(1.05);
}

.card:hover::before {
  opacity: 1;
}

/* Scroll Animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Forms */
input, select, textarea {
  width: 100%;
  padding: 16px;
  border-radius: var(--radius-input);
  border: 1px solid var(--color-border);
  font-family: inherit;
  font-size: 16px;
  background: var(--color-bg-light);
  transition: var(--transition-smooth);
  color: var(--color-text-primary);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-secondary);
  background: white;
  box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.1);
}

/* FAQ Accordion */
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 24px 0;
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 700;
  font-size: 18px;
  color: var(--color-primary);
  user-select: none;
}
.faq-icon {
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 16px;
  color: var(--color-text-secondary);
}
.faq-item.active .faq-question, .faq-item.active .faq-icon {
  color: var(--color-secondary);
}
.faq-item.active .faq-icon {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), padding 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  color: var(--color-text-secondary);
  font-size: 16px;
}
.faq-item.active .faq-answer {
  max-height: 600px;
  padding-top: 16px;
}

/* Mega Menu */
.has-mega-menu {
  position: relative;
}

.mega-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(15px);
  width: 900px;
  background: white;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-xl);
  padding: 32px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
  border: 1px solid var(--color-border-subtle);
  pointer-events: none;
  z-index: 999;
}

@media (min-width: 769px) {
  .has-mega-menu:hover .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
  }
}

.mega-menu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.nav-links .mega-menu-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px;
  border-radius: 12px;
  transition: var(--transition-smooth);
}

.nav-links .mega-menu-item:hover {
  background: var(--color-bg-subtle);
}

.nav-links .mega-menu-item::after {
  display: none !important;
}

.mega-menu-icon {
  width: 48px;
  height: 48px;
  background: var(--color-bg-light);
  color: var(--color-secondary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mega-menu-content {
  display: flex;
  flex-direction: column;
}

.mega-menu-content .title {
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
  font-size: 15px;
}

.mega-menu-content .desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

/* Responsive */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-primary);
  cursor: pointer;
  padding: 4px;
}

@media (max-width: 1024px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 80px 0; }
  .mega-menu { width: 700px; }
  .mega-menu-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .mobile-menu-toggle { display: block; }
  .nav-links-contact { display: none !important; }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: white;
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--color-border);
  }
  
  .nav-links.active {
    display: flex;
  }

  .nav-links a { font-size: 16px; padding: 12px 0; display: block; }
  .nav-links a::after { display: none; }
  
  /* Mobile Mega Menu Accordion */
  .mega-menu {
    position: static;
    width: 100%;
    transform: none;
    box-shadow: none;
    border: none;
    padding: 0 0 0 16px;
    opacity: 1;
    visibility: visible;
    display: none;
  }

  .has-mega-menu.active .mega-menu {
    display: block;
  }

  .mega-menu-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .header-actions .btn { 
    padding: 10px 16px; 
    font-size: 14px; 
  }
  
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
}